Oscillations — Chapter Summary
CBSE · Class 11 · Physics
Summary of Oscillations for CBSE Class 11 Physics. Key concepts: A motion that repeats itself, A and Frequency ν is the number.
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Overview
Oscillatory motion is a repeated to-and-fro motion about a mean position, while periodic motion is any motion that repeats after equal intervals of time. Circular motion is periodic but not oscillatory. Simple harmonic motion is the most important and simplest form of oscillatory motion, in which di
Key Concepts
A motion that repeats itself at
A motion that repeats itself at regular intervals of time. The smallest interval after which the motion repeats is called the period T.
A
A to-and-fro motion about a mean position. Every oscillatory motion is periodic, but circular motion is periodic without being oscillatory.
Frequency ν is the number
Frequency ν is the number of repetitions per unit time and ν = 1/T. The SI unit is hertz, where 1 Hz = 1 s⁻¹.
Displacement can mean change in any
Displacement can mean change in any physical quantity with time, not only position. It may represent position, angle, voltage, pressure, or fields.
SHM is oscillatory motion in
SHM is oscillatory motion in which displacement is x(t) = A cos(ωt + φ). It is the simplest oscillatory motion and occurs when the force is directly p
Learning Objectives
- Distinguish between periodic motion and oscillatory motion
- Define period, frequency, amplitude, phase, and angular frequency
- Recognize simple harmonic motion from its displacement function
- Relate SHM to the projection of uniform circular motion
- Derive and use expressions for velocity and acceleration in SHM
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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